/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineGroupsInterface.h
Get the cached list of users banned from this group. If the information is not cached locally, call QueryGroupDenylist to request it from the server.
Shared pointer to the cached roster structure if one exists
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< const [IGroupDenylist](API\Plugins\OnlineSubsystem\Interfaces\IGroupDenylist) > GetCachedGroupDenylist ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & ContextUserId, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & GroupId )